Psi1 Aurigae
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- For other star systems with this Bayer designation, see Psi Aurigae.
 The location of ψ1 Aurigae (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 24m 53.90129s[1] |
| Declination | +49° 17′ 16.4199″[1] |
| Apparent magnitude (V) | 4.91[2] |
| Characteristics | |
| Spectral type | M0 I[3] |
| U−B color index | +2.29[2] |
| B−V color index | +1.97[2] |
| R−I color index | 1.07 |
| Variable type | LC[4] |
| Astrometry | |
| Radial velocity (Rv) | +4.7[5] km/s |
| Proper motion (μ) | RA: –0.66[1] mas/yr Dec.: –1.82[1] mas/yr |
| Parallax (π) | 0.82 ± 0.28[1] mas |
| Distance | approx. 4,000 ly (approx. 1,200 pc) |
| Details | |
| Mass | 14.4 ± 0.8[6] M☉ |
| Radius | 637 R☉ |
| Luminosity | 63,579[7] L☉ |
| Temperature | 3,750[3] K |
| Metallicity [Fe/H] | +0.08[8] dex |
| Age | 12.3 ± 0.4[6] Myr |
| Other designations | |
Psi1 Aurigae (ψ1 Aur, ψ1 Aurigae) is the Bayer designation for a star in the northern constellation of Auriga. It is faintly visible to the naked eye with an apparent visual magnitude of 4.91.[2] Based upon a measured annual parallax shift of 0.82 mas,[1] it is approximately 4,000 light-years (1,200 parsecs) distant from the Earth.
This is a massive supergiant star with a stellar classification of M0 I.[3] It is a slow irregular variable of the LC type, with its brightness varying in magnitude by 0.44.[4] The star is more than 14[6] times as massive as the Sun and is blazing with 63,579[7] times the Sun's luminosity. This energy is being radiated into outer space from its outer atmosphere at an effective temperature of 3,750 K,[3] giving it the orange-red hue of a cool M-type star.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752v1, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. Note: see VizieR catalogue I/311.
- ↑ 2.0 2.1 2.2 2.3 Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series 34: 1–49, Bibcode:1978A&AS...34....1N.
- ↑ 3.0 3.1 3.2 3.3 Levesque, Emily M. et al. (August 2005), "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought", The Astrophysical Journal 628 (2): 973–985, arXiv:astro-ph/0504337, Bibcode:2005ApJ...628..973L, doi:10.1086/430901.
- ↑ 4.0 4.1 Adelman, Saul J. (2001), "Stars with the Largest Hipparcos Photometric Amplitudes", Baltic Astronomy 10: 589–593, Bibcode:2001BaltA..10..589A.
- ↑ Wielen, R. et al. (1999), Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions (35), Astronomisches Rechen-Institut Heidelberg, Bibcode:1999VeARI..35....1W.
- ↑ 6.0 6.1 6.2 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x.
- ↑ 7.0 7.1 Hohle, M. M.; Neuhäuser, R.; Schutz, B. F. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten 331 (4): 349, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355.
- ↑ Bakos, Gustav A. (October 1971), "Abundances of Heavy Elements in Late-Type Stars", Journal of the Royal Astronomical Society of Canada 65: 222, Bibcode:1971JRASC..65..222B.
- ↑ "phi Aur -- Star in double system", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-08-23.
External links
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